Enable erase-buffer
Make prelude-rename-file-and-buffer vc aware
Merge branch 'master' of github.com:bbatsov/prelude

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Add a few more ace-jump keychords
Improve prelude-open-with

Now it uses `xdg-open` where it makes sense. It also accepts a prefix
argument that forces manual selection of a command to run.
Don't try to save files when you don't have the permissions to do so
Merge branch 'master' of https://github.com/bbatsov/prelude
Merge branch 'master' of https://github.com/shiquanwang/prelude
Merge branch 'master' into shiquanwang